Contents
- Weather in April
- Frequently asked questions
- Average temperature in April
- Average pressure in April
- Average wind speed in April
- Average humidity in April
- Average rainfall in April
- Average rainfall days in April
- Average snowfall in April
- Average snowfall days in April
- Average daylight in April
- Average sunshine in April
- Average sunshine days in April
- Average UV index in April
- Average cloud cover in April
- Average visibility in April
Weather in April
Temperature
Herculaneum in April experiences an increase in the average high-temperature, moving from March's fresh 54.9°F (12.7°C) to a comfortable 65.8°F (18.8°C). Herculaneum's average low-temperature during April nights is observed to be a frosty 47.7°F (8.7°C).Humidity
In Herculaneum, the average relative humidity in April is 76%.Rainfall
In April, the rain falls for 15.3 days. Throughout April, 3.82" (97mm) of precipitation is accumulated. Throughout the year, in Herculaneum, there are 155 rainfall days, and 34.92" (887mm) of precipitation is accumulated.Snowfall
April through October are months without snowfall.Daylight
In April, the average length of the day is 13h and 13min.On the first day of the month, sunrise is at 6:45 am and sunset at 7:25 pm. On the last day of April, sunrise is at 6:04 am and sunset at 7:52 pm CDT.
Sunshine
In April, the average sunshine is 8.6h.UV index
In Herculaneum, Missouri, the average daily maximum UV index in April is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for average individuals.Note: A maximum high daily UV index of 4 during April translates into the following directions:
Undertake precautions - Guarding against sun damage is counselled. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in April?
What is the average humidity in April?
How much does it rain in April?
When it does not snow?
Does it snow in Herculaneum in April?
What is the average length of the day in April?
When is the sunrise / sunset in April?
How many hours of sunshine does Herculaneum have in April?
What is the UV index reading in April?
Average temperature in April
Herculaneum, MO
- Average high temperature in April: 65.8°F
The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is January (39°F).
- Average low temperature in April: 47.7°F
The month with the highest average low temperature is July (68.2°F).
The coldest month (with the lowest average low temperature) is January (25.2°F).
Average pressure in April
Herculaneum, MO
- Average pressure in April: 29.94"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in April
Herculaneum, MO
- Average wind speed in April: 8.5mph
The windiest month (with the highest average wind speed) is January (9mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in April
Herculaneum, MO
- Average humidity in April: 76%
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (72%).
Average rainfall in April
Herculaneum, MO
- Average rainfall in April: 3.82"
The wettest month (with the highest rainfall) is May (4.25").
The driest month (with the least rainfall) is February (1.97").
Average rainfall days in April
Herculaneum, MO
- Average rainfall days in April: 15.3 days
The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is January (8.2 days).
Average snowfall in April
Herculaneum, MO
- Average snowfall in April: 0"
The month with the highest snowfall is January (2.36").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in April
Herculaneum, MO
- Average snowfall days in April: 0 days
The month with the highest number of snowfall days is January (6.8 days).
The months with the least snowfall days are April, May, June, July, August and September (0 days).
Average daylight in April /
Average sunshine in April
Herculaneum, MO
- Average daylight in April: 13h and 1min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in April: 8h and 4min
The months with the most sunshine are June and July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).
Average sunshine days in April
Herculaneum, MO
- Average sunshine days in April: 13.4 days
The month with the most sunshine days is December (19.2 days).
The month with the least sunshine days is July (10.7 days).
Average UV index in April
Herculaneum, MO
- Average UV index in April: 4
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in April
Herculaneum, MO
- Average cloud cover in April: 41
The month with the most cloud cover is January (Cloud cover 49).
The months with the least cloud cover are June, July and August (Cloud cover 28).
Average visibility in April
Herculaneum, MO
- Average visibility in April: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Herculaneum, Missouri, USA
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